844404440 has 64 divisors (see below), whose sum is σ = 2093260320. Its totient is φ = 304000000.

The previous prime is 844404439. The next prime is 844404469. The reversal of 844404440 is 44404448.

It is a junction number, because it is equal to n+sod(n) for n = 844404397 and 844404406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34940 + ... + 53940.

Almost surely, 2^844404440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 844404440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1046630160).

844404440 is an abundant number, since it is smaller than the sum of its proper divisors (1248855880).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

844404440 is a wasteful number, since it uses less digits than its factorization.

844404440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19124 (or 19120 counting only the distinct ones).

The product of its (nonzero) digits is 32768, while the sum is 32.

The square root of 844404440 is about 29058.6379584453. The cubic root of 844404440 is about 945.1850332413.

Adding to 844404440 its reverse (44404448), we get a palindrome (888808888).

The spelling of 844404440 in words is "eight hundred forty-four million, four hundred four thousand, four hundred forty".